Any pages that become mapped into the address space of the process after a call to munlockall() shall not be locked, unless there is an intervening call to mlockall() specifying MCL_FUTURE or a subsequent call to mlockall() specifying MCL_CURRENT If pages mapped into the address space of the process are also mapped into the address spaces of other processes and are locked by those processes, the locks established by the other processes shall be unaffected by a call by this process to munlockall() Upon return from the munlockall() function, all currently mapped pages of the process' address space shall be unlocked with respect to the process' address space The memory residency of unlocked pages is unspecified If it is supported by the implementation, the munlockall() function shall always return a value of zero If it is not supported by the implementation, the munlockall() function shall return a value of -1 and set errno to indicate the error